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[S390] cleanup psw related bits and pieces

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Split out addressing mode bits from PSW_BASE_BITS, rename PSW_BASE_BITS
to PSW_MASK_BASE, get rid of psw_user32_bits, remove unused function
enabled_wait(), introduce PSW_MASK_USER, and drop PSW_MASK_MERGE macros.
Change psw_kernel_bits / psw_user_bits to contain only the bits that
are always set in the respective mode.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2011-10-30 15:16:50 +01:00
parent b6ef5bb3d9
commit b50511e41a
20 changed files with 109 additions and 125 deletions
Download patch file Download diff file Expand all files Collapse all files

53
arch/s390/kernel/setup.c
View file

@ -62,11 +62,11 @@
#include <asm/kvm_virtio.h>
#include <asm/diag.h>
long psw_kernel_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY |
PSW_MASK_MCHECK | PSW_DEFAULT_KEY);
long psw_user_bits = (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
PSW_MASK_PSTATE | PSW_DEFAULT_KEY);
long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY |
PSW_MASK_EA | PSW_MASK_BA;
long psw_user_bits = PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT |
PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK |
PSW_MASK_PSTATE | PSW_ASC_HOME;
/*
* User copy operations.
@ -278,22 +278,14 @@ early_param("mem", early_parse_mem);
unsigned int user_mode = HOME_SPACE_MODE;
EXPORT_SYMBOL_GPL(user_mode);
static int set_amode_and_uaccess(unsigned long user_amode,
unsigned long user32_amode)
static int set_amode_primary(void)
{
psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
PSW_MASK_PSTATE | PSW_DEFAULT_KEY;
psw_kernel_bits = (psw_kernel_bits & ~PSW_MASK_ASC) | PSW_ASC_HOME;
psw_user_bits = (psw_user_bits & ~PSW_MASK_ASC) | PSW_ASC_PRIMARY;
#ifdef CONFIG_COMPAT
psw_user32_bits = PSW_BASE32_BITS | PSW_MASK_DAT | user_amode |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
PSW_MASK_PSTATE | PSW_DEFAULT_KEY;
psw32_user_bits = PSW32_BASE_BITS | PSW32_MASK_DAT | user32_amode |
PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK |
PSW32_MASK_PSTATE;
psw32_user_bits =
(psw32_user_bits & ~PSW32_MASK_ASC) | PSW32_ASC_PRIMARY;
#endif
psw_kernel_bits = PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME |
PSW_MASK_MCHECK | PSW_DEFAULT_KEY;
if (MACHINE_HAS_MVCOS) {
memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess));
@ -329,7 +321,7 @@ early_param("user_mode", early_parse_user_mode);
static void setup_addressing_mode(void)
{
if (user_mode == PRIMARY_SPACE_MODE) {
if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY))
if (set_amode_primary())
pr_info("Address spaces switched, "
"mvcos available\n");
else
@ -348,24 +340,25 @@ setup_lowcore(void)
*/
BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096);
lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0);
lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
lc->restart_psw.mask = psw_kernel_bits;
lc->restart_psw.addr =
PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
if (user_mode != HOME_SPACE_MODE)
lc->restart_psw.mask |= PSW_ASC_HOME;
lc->external_new_psw.mask = psw_kernel_bits;
lc->external_new_psw.mask = psw_kernel_bits |
PSW_MASK_DAT | PSW_MASK_MCHECK;
lc->external_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
lc->svc_new_psw.mask = psw_kernel_bits | PSW_MASK_IO | PSW_MASK_EXT;
lc->svc_new_psw.mask = psw_kernel_bits |
PSW_MASK_DAT | PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
lc->program_new_psw.mask = psw_kernel_bits;
lc->program_new_psw.mask = psw_kernel_bits |
PSW_MASK_DAT | PSW_MASK_MCHECK;
lc->program_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
lc->mcck_new_psw.mask =
psw_kernel_bits & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
PSW_ADDR_AMODE | (unsigned long) pgm_check_handler;
lc->mcck_new_psw.mask = psw_kernel_bits;
lc->mcck_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
lc->io_new_psw.mask = psw_kernel_bits;
lc->io_new_psw.mask = psw_kernel_bits |
PSW_MASK_DAT | PSW_MASK_MCHECK;
lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
lc->clock_comparator = -1ULL;
lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
@ -554,7 +547,7 @@ static void __init setup_restart_psw(void)
* Setup restart PSW for absolute zero lowcore. This is necesary
* if PSW restart is done on an offline CPU that has lowcore zero
*/
psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
psw.mask = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA | PSW_MASK_BA;
psw.addr = PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));
}